I've used these for fullrange and subjectively they sound good. But they have rather high harmonic distortion in the midrange - not so obvious with music but very noticeable with sine waves. Also they need cutting off the whizzer cone and adding a tweeter above 10 kHz. What I do like is their bass - especially when using two mounted in push-pull to reduce distortion. They don't go ridiculously low but they sound tight and effortless.

Thank you Technofreak. I intend to try a couple of different drivers, I prefer listening to measuremens. Incidently, I watched a documentary about Estonia, what a fantastic and beautiful country you live in!